Collector layer for all-solid-state batteries, all-solid-state battery and carbon material

A current collector layer for an all-solid-state battery,

• the all-solid-state battery including a group 1 or 2 ion conductive solid electrolyte layer,
• the current collector layer being mixed with Si at a weight ratio of 1:1 to produce a mixture, the mixture having an X-ray diffraction spectrum having a ratio of a peak height a to a peak height b, a/b, of 0.03 or more and 3.5 or less as being measured, the peak height a being highest in a range of 2θ of 24 or more and less than 28°, and the peak height b being highest in a range of 2θ of 28 or more and less than 30°.

A carbon material used in a current collector layer of an all-solid-state battery,

• the all-solid-state battery including a group 1 or 2 ion conductive solid electrolyte layer,
• the carbon material being mixed with Si at a weight ratio of 1:1 to produce a mixture, the mixture having an X-ray diffraction spectrum having a ratio of a peak height a to a peak height b, a/b, of 0.2 or more and 10.0 or less as being measured, the peak height a being highest in a range of 2θ of 24° or more and less than 28°, and the peak height b being highest in a range of 2θ of 28° or more and less than 30°.